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backlight: lcd: Fix race condition during register

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[ Upstream commit cc21942bce ]

Once device_register is called for a device its attributes might be
accessed. As the callbacks of a lcd device's attributes make use of the
lcd_ops, the respective member must be setup before calling
device_register.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König
2016-07-06 19:33:05 +02:00
committed by Greg Kroah-Hartman
parent acc365c028
commit 6aaf9ba9bd
1 changed files with 2 additions and 2 deletions
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4
drivers/video/backlight/lcd.c
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@@ -226,6 +226,8 @@ struct lcd_device *lcd_device_register(const char *name, struct device *parent,
dev_set_name(&new_ld->dev, "%s", name);
dev_set_drvdata(&new_ld->dev, devdata);
new_ld->ops = ops;
rc = device_register(&new_ld->dev);
if (rc) {
put_device(&new_ld->dev);
@@ -238,8 +240,6 @@ struct lcd_device *lcd_device_register(const char *name, struct device *parent,
return ERR_PTR(rc);
}
new_ld->ops = ops;
return new_ld;
}
EXPORT_SYMBOL(lcd_device_register);